# std::fegetexceptflag, std::fesetexceptflag

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< cpp‎ | numeric‎ | fenv

Defined in header `<cfenv>` |  |
int fegetexceptflag( std::fexcept_t* flagp, int excepts ); | (1) | (since C++11)
int fesetexceptflag( const std::fexcept_t* flagp, int excepts ); | (2) | (since C++11)

1) Attempts to obtain the full contents of the floating-point exception flags that are listed in the bitmask argument `excepts`, which is a bitwise OR of the floating point exception macros.

2) Attempts to copy the full contents of the floating-point exception flags that are listed in `excepts` from `flagp` into the floating-point environment. Does not raise any exceptions, only modifies the flags.

The full contents of a floating-point exception flag is not necessarily a boolean value indicating whether the exception is raised or cleared. For example, it may be a struct which includes the boolean status and the address of the code that triggered the exception. These functions obtain all such content and obtain/store it in `flagp` in implementation-defined format.

### Parameters

flagp | - | pointer to an std::fexcept_t object where the flags will be stored or read from
excepts | - | bitmask listing the exception flags to get/set

### Return value

​0​ on success, non-zero otherwise.

### See also

C documentation for fegetexceptflag, fesetexceptflag

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